Best Fertiliser For Citrus Trees

Citrus trees are a beautiful addition to any garden, and they are relatively easy to grow. However, they do require some care if you want to keep them healthy. The best fertilizer for citrus trees is one that contains nitrogen, phosphorus, and potassium. If the soil in your area is lacking in these nutrients, you can add them yourself by mixing the fertilizer with your soil before planting new trees or by adding it when you prune an existing tree.

The first step in growing citrus trees is to choose the right soil. Most citrus plants need sandy soil that drains well and doesn’t get too wet during rainy periods. If you have clay soil or other types of soil that aren’t ideal for growing citrus, consider adding organic matter such as compost or peat moss before planting new trees or pruning existing ones. This will help loosen up the soil so it drains better and doesn’t become too compacted over time due to frequent watering by rainwater runoff from nearby roofs and roadsides into your yard area where these plants are located.

A Citrus Tree is a broad term used to describe all the various types of trees that produce citrus fruits, such as lemons, oranges, and grapefruit. The most common citrus fruit grown in Australia is the Orange (Citrus sinensis), but there are also numerous other varieties that are suitable for growing here, including Mandarins (Citrus reticulata), Lemons (Citrus limon), and Limes (Citrus aurantifolia).

The best fertilizer for Citrus trees depends on what species you want to grow. While most people would recommend using something general like Miracle-Gro Garden Soil Mix or Tomato Food from Garden Organics as it will provide all essential nutrients needed by your plants without any concern about overfeeding or underfeeding them with too much nitrogen or potassium respectively due to incorrect formulation by manufacturers at large scale production plants which can lead to nutrient deficiencies if not corrected before sale through specialized formulas available only from professional garden centres where staff members know how much should be applied per size of the tree so no harm caused during application period which could result in poor growth rate throughout life span due how many times one might replant before realizing a problem exists until finally dying early due lack nutrients necessary survive harsh conditions found naturally occurring within soil layers near-bottom layer; however if this sounds like too much work then just stick with Miracle-Gro.


While manure is not the most cost-effective fertilizer for citrus trees, it has many benefits. Manure contains nitrogen, phosphorus, and potassium, which are all key nutrients for citrus tree growth. Additionally, manure can provide calcium to help increase the size of your citrus fruit.

Although it is not difficult to find or acquire manure for your garden and there are many different types of animal manure on the market such as horse or cow dung; you should be aware that some manures contain pathogens that could harm your crops if used improperly. When using animal manures in a vegetable garden make sure they’re aged properly (at least six months) so they will not burn young plants’ roots when applied directly into the soil around them


Mulch is a layer of material that is applied to the soil surface to control moisture, weeds, and productivity. It’s usually applied around the base of trees to reduce evaporation and water loss.

Mulches can be organic or inorganic. Organic mulches include bark chips, wood shavings, straw, and hay; while inorganic mulches are made from materials such as pebbles or broken concrete blocks. The most popular materials used as mulch are pine needles, cocoa bean hulls (or cocoa fiber), cypress bark chips, hardwood sawdust, and shredded newspaper; these are all very effective in reducing water evaporation rates while also providing nutrients back into your soil once they decompose over time.

Fish Emulsion Fertiliser

Fish emulsion is made from fish waste and is a good source of nitrogen and phosphorus. It can be used to fertilize citrus trees that are in pots or in the ground.

Fish emulsion will give your citrus tree a boost when it’s needed most, making it an ideal choice for new plants. It also makes a great addition to your existing fertilizer program if you’re looking for a way to increase fruit production at the end of summer or after winter dormancy.

Seaweed Fertiliser

Seaweed fertilizer is a natural soil conditioner that provides the following benefits:

  • A good source of nutrients, including nitrogen, potassium, and phosphorus.
  • A good source of trace elements such as copper, iron, and zinc.
  • A good source of micronutrients such as manganese, molybdenum as well as other essential elements like boron and sulfur.

Liquid Seaweed

Liquid seaweed can be a great choice for citrus trees as it contains all of the nutrients your tree needs to grow. However, make sure that you choose a liquid seaweed with a high concentration of nutrients, otherwise, you may end up having to apply more fertilizer than necessary in order to get the same results.

Liquid seaweed also comes at many different prices so do your research and find out what’s best suited for your budget before purchasing.

Cow Dung Compost Tea

Cow dung compost tea is a liquid fertilizer produced from the decomposition of cow dung. It is used to fertilize plants and soil and improve their health.

The basic method to make cow dung compost tea is simple: you put some cow dung into the water, leave it for a while so that it breaks down and brews up into a liquid form, then add this to your soil as an organic fertilizer.

Once made, you can either use the tea immediately or store it in an airtight container until you are ready to use it (up to 6 months). Dilute with water before applying it directly onto your soil or plants.

Bone Meal

A bone meal is an organic fertilizer that contains nitrogen, phosphorus, and potassium. It can be used as a soil conditioner to improve the structure of sandy soils or as a source of slow-release nitrogen in your garden.

Bone meal is safe to use on vegetables and flowers without fear of burning plants or killing beneficial insects.

It’s best used in spring and fall when citrus trees are actively growing so they have time to absorb nutrients from the soil before winter sets in. The bone meal should be applied at least six weeks before planting or transplanting citrus trees so there’s time for it to work its way into their root system.

You can apply bone meal by sprinkling it over the root zone once per year with each irrigation (1/2 cup per tree), but applying more than 4 cups per tree may cause toxicity problems due to high levels of nitrogen in the soil; this would mean less fruit production overall.

Alfalfa Meal Fertiliser

Alfalfa Meal is a good source of nitrogen, phosphorus, and potassium. It also provides calcium, magnesium, and other minor elements. This fertilizer can be applied in the spring and summer months to citrus trees with vigorous growth rates. The use of this fertilizer will stimulate new growth on your citrus trees each year as well as increase their fruit production by up to 15%. Alfalfa meal has been known to increase the cold hardiness of citrus trees making them more resilient against frost damage during winter months.

Price: $20 – $35 per bag

Citrus Fertilizer Brands In Australia

In Australia, there are various brands of citrus fertilizers that you can choose from. Some of these include:

  • Azalea Tree Fertilizer – This is a general-purpose fertilizer for all types of plants, including citrus trees. It’s available in either liquid or granular forms and comes with complete instructions on how much to use depending on the size and age of your tree.
  • Tropicool Citrus Tree Fertilizer – This product is specifically designed for Australian citrus trees (including limes). It contains phosphorus, potassium, and magnesium as well as other nutrients which help prevent fungal diseases while improving fruit quality. The manufacturer claims that this product will increase yields by up to 20%.

Having a healthy citrus tree depends on choosing the right fertilizer.

When it comes to growing citrus trees, the right fertilizer can make all the difference. Fertilizer provides the nutrients that your tree needs to be healthy and produce fruit. It helps promote the growth of flowers, leaves, and fruit by adding minerals and moisture that may be lacking in soil.

If you want to ensure that your citrus tree is getting all of the nutrients it needs for optimal growth, choosing a good fertilizer can be daunting—there are so many options. But don’t worry: we’ve done the research for you on this one. We’ve tested dozens of fertilizers from around the web and found 6 favorites.

How To Apply

The best time to fertilize citrus trees is in early spring when the buds begin to swell, and again at the beginning of summer. The amount of fertilizer that you apply depends on the size of your tree and its age. For example:

  • If you have a young citrus tree or shrub about 3 feet tall, apply half a cup (120 ml) of ammonium nitrate per year per foot (30 cm) of trunk diameter.
  • If you have an older tree with a trunk diameter between 12 and 24 inches (30-60 cm), apply 3 cups (710 ml) of ammonium nitrate per year per foot (30 cm) of trunk diameter.

When To Apply

Apply fertilizer in the spring, summer, and fall.

  • Fertilize citrus trees in the morning or evening on dry days. Do not apply fertilizer when it’s raining or has rained recently.
  • In the springtime, fertilize newly planted citrus trees only once a year before new growth begins (usually in April). This will help get them off to a good start before they need regular feeding throughout the season.

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